再强的菇凉也胜不过大姨妈
[zài qiáng de gū liáng yĕ shèng bù guò dà yí mā]
'Gu Liang' refers to a strong or brave girl, and 'period' here humorously refers to menstruation. This name suggests that even the toughest girl can be vulnerable, as everyone has their limits, which may imply physical or emotional weaknesses that no one can avoid, including strong women. It's an expression of vulnerability in humor.